Instrument, sample, and conditioning preparation

Prepare the instrument

Conduct an abrasion test according to the following requirements:

ISO 12947-1、ISO 12945-2

The abrasion table shall be covered with a circle of woven or non-woven felt (non-woven fabric is only used for M & S test). Both kinds of felt are available from the laboratory. Then, cover the wear table with standard wear fabric. The standard wear fabric shall meet the requirements of iso12947-1 and can be obtained from ChiuVention.

All samples and standard fabrics shall be conditioned in a standard atmosphere for testing.

All wear and pilling tests shall be conducted in a standard atmosphere: 20 ± 2 ° C and 65% ± 2% RH.

Take the Abrasion test as an example 

Prepare abrasive

1. After adjusting the felt and standard fabric, cut a group of felt and standard fabric from the felt and standard fabric respectively according to the test requirements;
2. Place the felt in the center of the grinding table as shown in Figure 1-(b);
3. Place the standard fabric in the center and cover it on the felt as shown in Figure 1- (c);
4. Put the snap ring on the grinding table and press the standard felt with a heavy hammer as shown in Figure 1-(d).
5. Tighten the snap ring and remove the heavy hammer as shown in Figure 1-(e);
6. Repeat the above operation for the rest of the grinding table of the machine

Prepare test samples

After adjusting the foam and the tested samples, a group of foam and the samples to be tested are cut from foam and tested samples according to the standard test requirements.

1. Put the compression nut into the clamping table as shown in Figure 3 – (a);
2. Put the sample to be tested face down into the compression nut as shown in Figure 3 – (b);
3. Place the sponge on the sample to be tested as shown in Figure 3- (c);
4. Place the fixture inserts on the sponge with the conical part downward As shown in Figure 3- (d);
5. Screw the clamp socket onto the compression nut as shown in Figure 3- (E). (Ensure that the fixture is tightened to prevent the sample from falling off during the friction test)
6. Insert the fixture pin shaft through the shaft sleeve and into the assembled fixture as shown in Figure 3 – (f). And put the weight required for the test requirements;

Note: all parts of a grinding station are numbered. The correct number of parts must be used in the correct station. For example, all components marked with No. 1 should be assembled and used in station 1.

1. Repeat the above process for all samples to be tested;
2. Set the machine parameters and start the test according to the steps

Lissajous pattern Inspection method

Obtain each table’s Lissajous graphs as follows.

Move the material from the grinding table. Cover the table with a piece of white paper. The paper should be round, with a diameter of (100±5) mm. It should be very flat and have a minimum mass of 100 g/m2.

Put a steel sleeve in the guide. It should match the specimen pin’s diameter. Then, put in a common ballpoint pen so that its tip touches the paper. A complete Lissajous pattern is formed after 16 times of friction.

Draw two lines that are parallel. They should intersect the outer curves of the Lissajous pattern. Draw two more lines for the other two sides. Make sure that these lines cross at right angles. Measure each side properly to an accuracy of 0.2 mm. Check the 31 lines drawn and, importantly, the symmetry of the Lissajous pattern. If the curves coincide with each other or are unevenly spaced (see Figure A.1), please consult us.